400 meter U18 Men - Heats, Heat:1 of 4 ; Official result since 18:48
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 7 | 1655 | 46.20 | Q | |||||
| 2 | 1 | 1410 | MWEWA ISAAC | ZAM | U18 | 49.41 | Q | ||
| 3 | 6 | 1228 | LUKINDO MPAJI | TAN | U18 | 49.80 | Q | ||
| 4 | 2 | 1491 | RIAK JAMES DOK | SSD | U18 | 49.90 | |||
| 5 | 5 | 1135 | CHABALE JUNIOR HLOMANI | BOT | U18 | 50.40 | |||
| 6 | 4 | 1720 | MAGASO ORLANDO | MOZ | U18 | 54.70 | |||
| 3 | 1010 | CISSE MOR | SEN | U18 | DNS |